Vintage German Aristo Logarithmic Ruler Slide Rule Calculator with case Nr. 99 k - La Paz County Sheriff's Office "Dedicated to Service"
![Vintage Circular Logarithmic Slide Rule by K. Emil Troger - La Paz County Sheriff's Office "Dedicated to Service" Vintage Circular Logarithmic Slide Rule by K. Emil Troger - La Paz County Sheriff's Office "Dedicated to Service"](https://i.ebayimg.com/images/g/HuIAAOSw0yhkjfz1/s-l1600.jpg)
Vintage Circular Logarithmic Slide Rule by K. Emil Troger - La Paz County Sheriff's Office "Dedicated to Service"
![$60 one of the best pilot watches/slide rule watches. Function is great, feels great on the wrist : r/casio $60 one of the best pilot watches/slide rule watches. Function is great, feels great on the wrist : r/casio](https://i.redd.it/wy2vyru360jb1.jpg)